M20-9731046 Equivalent & Substitute Parts

Part Overview

The M20-9731046 is a vertical rectangular connector header manufactured by Harwin Inc., designed for through-hole mounting with 10 positions at 0.100" (2.54mm) pitch. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The connector features male pins with solder termination, unshrouded design, and brass contacts with tin finish suitable for board-to-board or cable applications.

Key Parameters

Parameter	M20-9731046 Specification
Manufacturer	Harwin Inc.
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	10
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Contact Length - Mating	0.276" (7.00mm)
Contact Length - Post	0.122" (3.10mm)
Overall Contact Length	0.496" (12.60mm)
Insulation Height	0.100" (2.54mm)
Contact Material	Brass
Contact Finish - Mating	Tin
Contact Finish - Post	Tin
Insulation Material	Polyamide (PA6T), Nylon 6T
Operating Temperature	-40°C ~ 105°C
Current Rating	3A per Contact
Material Flammability Rating	UL94 V-0
Insulation Color	Black
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the M20-9731046 is determined by strict alignment of the following critical parameters:

Primary Matching Criteria:

Pitch - Mating: 0.100" (2.54mm)
Number of Positions: 10
Number of Rows: 1
Contact Type: Male Pin
Mounting Type: Through Hole
Termination: Solder
Fastening Type: Push-Pull
Style: Board to Board or Cable
Shrouding: Unshrouded

Secondary Compatibility Parameters:

Contact Shape: Square
Insulation Material: Polyamide or equivalent thermoplastic
Material Flammability Rating: UL94 V-0
RoHS Compliance Status

Substitute parts are grouped into two categories based on mechanical and electrical compatibility:

Category A - Direct Mechanical Equivalents: Parts with contact lengths and insulation heights within acceptable tolerance ranges for direct PCB mounting without mechanical redesign.

Category B - Functional Equivalents: Parts meeting all primary criteria but with minor dimensional variations in contact length or insulation height that may require board layout verification.

Parameter Comparison

Parameter	M20-9731046	M20-9731045	0022284104	0022284105	0022284107	0022285105	0901200770	0901200930	1-826629-0	2310-6211-TB	4-103321-0-10
Manufacturer	Harwin	Harwin	Molex	Molex	Molex	Molex	Molex	Molex	TE Connectivity	3M	TE Connectivity
Pitch (mm)	2.54	2.54	2.54	2.54	2.54	2.54	2.54	2.54	2.54	2.54	2.54
Positions	10	10	10	10	10	10	10	10	10	10	10
Rows	1	1	1	1	1	1	1	1	1	1	1
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Kinked Pin, Solder	Solder	Solder	Solder	Solder	Solder
Contact Length - Mating (mm)	7.00	7.00	8.13	7.49	8.13	7.49	6.75	6.75	6.70	8.08	8.08
Contact Length - Post (mm)	3.10	3.10	3.05	3.05	3.05	3.43	2.90	2.90	3.20	3.05	3.18
Overall Contact Length (mm)	12.60	12.60	13.46	12.83	13.46	13.21	12.15	12.15	12.70	13.67	14.65
Insulation Height (mm)	2.54	2.54	2.29	2.29	2.29	2.29	2.50	2.50	2.79	2.54	2.29
Contact Finish - Mating	Tin	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Tin-Lead
Contact Material	Brass	Brass	Not Specified	Not Specified	Not Specified	Not Specified	Brass	Brass	Brass	Copper Alloy	Copper Alloy
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	Polybutylene Terephthalate (PBT)	Thermoplastic, Glass Filled	Thermoplastic
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	Not Specified	Not Specified	Not Specified	Not Specified	-55°C ~ 125°C	-55°C ~ 125°C	-65°C ~ 105°C	-55°C ~ 105°C	-65°C ~ 105°C
Current Rating	3A per Contact	3A per Contact	Not Specified	Not Specified	Not Specified	Not Specified	Not Specified	Not Specified	5A	3A	3A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS non-compliant	RoHS non-compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Obsolete

Engineering Selection Recommendations

Primary Recommendation: M20-9731045 (Harwin Inc.)

The M20-9731045 is the direct successor to the M20-9731046 within the same manufacturer's product line. It maintains identical mechanical dimensions, pitch, position count, and mounting configuration. The primary difference is the contact finish upgrade from tin to gold on the mating surface, which enhances contact reliability and corrosion resistance. This part is active in production status and ROHS3 compliant, making it the preferred choice for new designs and direct replacement applications.

Secondary Recommendations - Molex KK254 Series (0022284104, 0022284105, 0022284107, 0022285105)

These Molex parts meet all primary substitution criteria with 2.54mm pitch, 10 positions, single row, through-hole solder termination, and unshrouded design. All are active production parts with ROHS3 compliance. Dimensional variations exist in contact length and insulation height, requiring PCB layout verification. The 0022284105 offers the closest overall contact length match at 12.83mm. The 0022285105 features kinked pin termination for enhanced mechanical retention.

Alternative Recommendation - Molex C-Grid III Series (0901200770, 0901200930)

These parts provide extended operating temperature range (-55°C to 125°C) compared to the original specification. Contact length variations require board design assessment. Both are active production parts with ROHS3 compliance. The 0901200930 is supplied in tray packaging.

Alternative Recommendation - TE Connectivity AMPMODU Mod II (1-826629-0)

This part offers 5A current rating per contact, exceeding the original 3A specification. Operating temperature range is -65°C to 105°C. Insulation material is PBT with green color. Active production status and RoHS compliance are confirmed. Dimensional variations in insulation height (2.79mm vs. 2.54mm) require verification.

Not Recommended - 3M 2310-6211-TB and TE Connectivity 4-103321-0-10

The 3M part is RoHS non-compliant and REACH affected, making it unsuitable for new designs in regulated applications. The TE Connectivity 4-103321-0-10 is obsolete and RoHS non-compliant, limiting its utility for ongoing procurement.

Frequently Asked Questions (FAQ)

Q: Can M20-9731045 be used as a direct drop-in replacement for M20-9731046?

A: Yes. The M20-9731045 maintains identical mechanical dimensions, pitch, position count, and mounting type. The contact finish upgrade from tin to gold improves reliability without affecting mechanical compatibility.

Q: What are the key dimensional differences between M20-9731046 and Molex KK254 substitutes?

A: Molex KK254 parts (0022284104, 0022284105, 0022284107) have insulation heights of 2.29mm compared to 2.54mm on the original part. Contact lengths vary: 0022284105 at 7.49mm mating length is closest to the original 7.00mm. PCB hole spacing and component clearance must be verified before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: No. The 3M 2310-6211-TB and TE Connectivity 4-103321-0-10 are RoHS non-compliant. All other listed substitutes are ROHS3 compliant or RoHS compliant.

Q: What is the difference between Molex 0022284105 and 0022285105?

A: Both have identical pitch, position count, and mating contact length (7.49mm). The 0022285105 features kinked pin termination in addition to solder termination, providing enhanced mechanical retention in the PCB. The 0022285105 also has a longer post length (3.43mm vs. 3.05mm).

Q: Can I use parts with different operating temperature ranges?

A: Yes, if your application requirements permit. The original M20-9731046 operates from -40°C to 105°C. Molex C-Grid III parts (0901200770, 0901200930) extend to -55°C to 125°C, providing wider environmental tolerance. TE Connectivity 1-826629-0 operates from -65°C to 105°C. Verify that your design requirements align with the selected part's temperature specification.

Q: What packaging options are available?

A: M20-9731045 is supplied in bulk packaging. Molex parts are supplied in bulk or tray packaging (0901200930 in tray). TE Connectivity 1-826629-0 is bulk packaged. Packaging selection depends on procurement volume and handling requirements.

Q: Are there current rating differences among substitutes?

A: Yes. The original M20-9731046 and most substitutes are rated at 3A per contact. TE Connectivity 1-826629-0 provides 5A per contact, offering higher current capacity. Molex KK254 and C-Grid III series do not specify current ratings in the provided data.

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